Machine for performing abrading operations on shoes or articles of like character



E. I. LA CHAPELLE MACHINE FOR PERFORMING ABRADING OPERATIONS ON SHOES OR ARTICLES OF LIKE CHARACTER Filed April 8, 1937 Oct. 24, 1939.

VVE/VTQ! MM @QZ L Y@ Patented Oct. 24, 1939 UNITED STATES PATENT OFFICE MACHINE Fon PERFORMING. ABRADING OPERATIONS oN sHoEs on ARTICLES oF LIKE CHARACTER Application April 8, 1937, Serial No. 135,761

5 Claims.

, This invention relates to methods of and machines for .performing abrading operations on shoes or articles. of like character and is herein illustrated and described in connection with the roughing of overlasted margins of shoe uppers to prepare them for the reception of cement. In performing roughing operations of this character the entire marginal portion of the lasted shoe upper lying over the insole should be roughened to the extreme edge of the shoe bottom. A considerable degree of care, however, must be exer- .cised to avoid cutting through the upper material adjacent to the` edge of the shoe bottom or .even roughing that locality deeply. Otherwise :the weakened upper material is likely to break away from the shoe bottom during wear.

In View of these considerations an object of the invention is to provide an improved roughing machine which will rough the overlasted margin of the upper to the edge of the insole Without :damaging the upper material in the manner above pointed out.l v,With this object in View and in accordance with a feature of the invention the improved machine is provided with a pair of abrading members adapted for coarse and fine roughing, respectively, and with a gage for enabling the shoe to fbe presented vto both members simultaneously. In the illustrated machine ,the gage is adjacent to the ner roughing tool. The relatively coarse roughing tool is thus enabled to perform a Vrelatively coarse and deep or heavy roughing operation upon that portion of the upper lying well within the edge of the shoe bottom while that portion adjacent to the edge of the shoe bottom is more lightly roughened to avoid any danger of weakening the upper material at that locality. In accordance with a further feature the relatively finer tool is driven through a friction clutch which yields when any undue resistance is encountered and thereby further safeguards the portion of the upper material adjacent to the edge of the shoe bottom from danger of being weakened.

These and other features of the invention, including certain details of construction and combination of parts, will vbejdescribed in connection with the illustrated machine and pointed out in the appended claims.

Referring now to the accompanying drawing,

Fig. 1 is a view in front elevation of the machine;

Fig. 2 is a sectional view illustrating one of the improved roughing tools taken on the line II-II of Fig. l and looking in the direction of the arrows;

Fig. 3 is a fragmentary sectional view similar to Fig. 2 illustrating a lguard associated with another roughing tool; and

Fig; 4 is a sectional View similar to Fig. 2 illustrating the construction of an alternative 5 form of roughing tool.

As already mentioned, this invention, in its method aspect, -contemplates subjecting that portion of the -overlasted margin of a shoe upper which is immediately adjacent to the edge of the 10 shoe bottom to a relatively fine roughing operation, and subjecting the portion of the overlasted margin which lies within and is spaced from the edge -of the k-shoe bottom to a coarser roughing operation. The machine which is about to be 15 described affords a convenient means for carrying out the method and from the description of the machine and its mode of operation the method'will be readily understood.

As shown in Fig. l the machine is mounted 20 upon a work bench I or `other suitable support. Secured upon the bench I are standards 2 which carry suitable bearings for a shaft y3 driven by a pulley I4 from 'any suitable source of power.

.A roughing tool 4 is carried by the shaft 3. 25 This -tool comprises a pair of abrading wheels 5 and 6, which Wheels in the illustrated machine may be 4composed of emery or like material, the wheel 6 having a peripheral abrading surface which 'is relatively narrow as compared 30 with that of the wheel 5. The wheel 5 is composed of relatively coarse grit and the wheel 6 `of relatively fine grit. The wheel 5 is secured between a pair of metal disks 9 and II by rivets I2. The disk 9 extends from a hub I0 which is 35 secured to the shaft 3 by a tapered pin I3. The wheel 6 is secured between metal disks I5 and Il by rivets I'I. The disk I5 extends from a hub .I6 vwhich is freely rotatable relatively to the shaft 3. As shown in Fig. 2, ythe central por- 40 tions of the two end faces of the wheel 5 are relieved to accommodate the disks 9 and II, respectively. The disk I'I likewise is partially countersunk into the end face of the wheel .5. The combined thickness `of the disks Ii and I'I is 45 slightly greater than the .combined depth of the recesses which receive these disks in order to provide a minimum clearance between the peripheral portions of the wheels when the disks are in contact with each other. rIhe wheel 6 50 is urged toward the wheel 5 by a spring I8 surrounding the shaft 3 and interposed between the disk I5 is a washer I8 which is backed up by a nut I9 threaded upon the shaft 3. The disk I'I is thus held against the disk II by a pressure 55 which may be adjusted by turning the nut I9.

Secured upon the bench I by screws 23 is an upstanding shield 2| having formed in it an opening 24 through which an arc of the pe riphery of the tool 4 extends. Secured upon the shield 2| by screws 22 is a work guide 20, the operative portion of which consists of a flange extending outwardly' at right angles from the guard 2l for engaging the upper at the sideV of the last.

The operation of the above-described tool 4 is illustrated in Fig. 2. Referring to that figure, a shoe A is presented to that portion of the tool which extends through the opening 2N with the overlasted margin of the shoe upper engaging the periphery of the wheels 5 and B and with the upper at the side of the last held against the guide l 2l). The greater portion of the width of the overlasted portion of the upper is subject to the action of the wide and relatively coarser abrading wheel 5 while a relatively narrow portion of the overlasted upper which is immediately adjacent to the margin of the shoe bottom is subjected to the action of the narrow and ner abrading wheel 6. The greaterrportionof the overlasted margin of the upper may thus be roughed to an extent which, if carried to the extreme margin of the shoe bottom, might involve the danger of cutting through or weakening the upper at that portion. However, the extreme marginal portion is not left untreated but is roughed more lightly to avoid any danger of cutting through the upper material. As a further provision to avoid cutting through the upper by the wheel B it will be noted that this wheel is not driven positively from the shaft 3 but is driven by the frictional engagement of the disks II and I'I which, together with the spring I8 and its associated members, constitute an adjustable friction clutch. It frequently happens that wrinkles, pleats or other protuberances of the upper material occur at the marginal portion of the shoe bottom. The excessive pressure of such protuberances against the wheel 6 will be sufficient t0 stop the rotation of the wheel 6 and thereby avoid cutting through the upper materials at such localities.

The tool comprising the wheels 'I and 8 is in all respects similar to the tool 4 except for the fact that it is of considerably smaller diameter to enable it to reach into the concave shank portion of the shoe. In using this tool for operation upon the shank as illustrated in Fig. 3 it is convenient to employ a guide 20 having an inclined Patent of the United States is:

adjacent to each other, a shield having an open-V ing to afford access to said wheels over a limited area, and a gage mounted on said shield adjacent to the side of said wheel of relatively fine grit for engagement with the side of a shoe to enable the overlasted upper to be presented to said wheels.

2. An abrading machine comprising a driven shaft,` a rotary abrading tool secured upon said shaft, a second rotary abrading tool rotatably mounted upon said shaft, a pair of friction disks mounted on said abrading members, respectively, said members being constructed and arranged to clear each other except by the engagement of said friction disks, a spring for urging the second-mentioned member toward the rst-mentioned member to bring said friction disks into engagement, and an adjustable abutment for said spring carried by said shaft.

3. A machine for simultaneously roughing two adjacent bands, each of substantial width, on a surface of a shoe, comprising a pair of adjacent abrading tools adapted to relatively coarse and ne roughing operations, respectively, each tool having an active face of a width equal to that of the corresponding roughened band to be produced upon the shoe and the active faces of the two tools being in alinement with each other, and an edge gage beside one vof the tools constructed and arranged so to guide a shoe relatively to the tools that the roughened surface produced by the tools will be adjacent to the edge of the shoe and parallel thereto.

4. In a machine for roughing the overlasted margin of a shoe upper, the combination of a pair of "cylindrical abrading wheels of relatively coarse and ne grit, respectively, having the active segments of their. abrading surfaces side by side and flush with each other, and a shoe edge gage positioned close to the `side of one of said wheels and projecting outward beyond the periphery thereof.

5. In a machinerfor roughing the overlasted margin of a shoe upper, a driven shaft, a pair of cylindrical abrading tools of the same diameter, one of which is coarse and the other of which is fine, mounted side by side upon said shaft, the active faces of the two tools being flush and their combined width being equal to the width of the band on the overlasted upper to be roughed, the coarse tool being xed to the shaft and the fine tool being frictionally connected with the shaft, and a stationary shoe edge gage positioned close beside the outer side of the ne wheel, whereby the overlasted margin of the upper of a shoe moved along in contact with said edge will be simultaneously finely and lightly roughed adjacent to the edge of the shoe and coarsely and positively roughed inward from the edge of the shoe.

EUCLID I. LA CHAPELLE.V 

